A Comparison of Machine Learning and Deep Learning Techniques for Activity Recognition using Mobile Devices Articles uri icon

publication date

  • January 2019

issue

  • 3

volume

  • 19

international standard serial number (ISSN)

  • 1424-8220

abstract

  • We have compared the performance of different machine learning techniques for human activity recognition. Experiments were made using a benchmark dataset where each subject wore a device in the pocket and another on the wrist. The dataset comprises thirteen activities, including physical activities, common postures, working activities and leisure activities. We apply a methodology known as the activity recognition chain, a sequence of steps involving preprocessing, segmentation, feature extraction and classification for traditional machine learning methods; we also tested convolutional deep learning networks that operate on raw data instead of using computed features. Results show that combination of two sensors does not necessarily result in an improved accuracy. We have determined that best results are obtained by the extremely randomized trees approach, operating on precomputed features and on data obtained from the wrist sensor. Deep learning architectures did not produce competitive results with the tested architecture.

keywords

  • deep learning; activity recognition; mHealth; safe environment; active aging;
    ambient-assisted living